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Sunday, January 22, 2023

The GUI Tkinter Library Python

1. Description Of GUI Tkinter Library

Tkinter is a module in the Python programming language that provides a set of tools for creating graphical user interfaces (GUI) for desktop applications. It is based on the Tk GUI toolkit, which is a popular toolkit for creating graphical interfaces on a variety of platforms. Tkinter is included with the standard Python distribution, which means it is available for use in any Python program without having to install any additional software. Tkinter provides a simple and easy-to-use interface for creating windows, buttons, labels, text boxes, and other common GUI elements. It also provides a variety of options for customizing the appearance and behavior of these elements. For example, you can change the font, color, and size of text displayed in a label, or you can add an image to a button. Tkinter also provides a number of advanced features that can be used to create more complex and powerful GUI applications. For example, it provides support for creating and managing multiple windows, and it allows you to create and manage a variety of different types of widgets, such as lists, checkboxes, and radio buttons. In addition to its core functionality, Tkinter also includes a number of additional modules that can be used to extend its functionality. These modules include ttk, which provides a set of enhanced widgets; tix, which provides a set of additional widgets; and ScrolledText, which provides a widget for displaying and editing large amounts of text. Tkinter is widely used in Python programs to create graphical interfaces for desktop applications. It is a versatile toolkit that can be used to create a wide variety of applications, from simple utilities to complex enterprise-level applications. Due to its simplicity and ease-of-use, it is also a popular toolkit for learning the basics of GUI programming in Python.

2. List of Tkinter widgets

Here is a list of some commonly used Tkinter widgets, along with brief descriptions of their functionality:
  1. Button: This widget is used to create a button that the user can click to perform an action. You can specify the text or image to be displayed on the button, and you can attach a command or function to be executed when the button is clicked.
  2. Label: This widget is used to display text or images. It can be used to display static information, such as a title or instructions, or to display dynamic information, such as the current date or time.
  3. Entry: This widget is used to create a single-line text input field. It can be used to accept input from the user, such as a name or a password.
  4. Text: This widget is used to create a multi-line text input field. It can be used to accept input from the user, such as a note or a comment, or to display a large amount of text.
  5. Checkbutton: This widget is used to create a checkbox that the user can select or deselect. It can be used to enable or disable certain options or features.
  6. Radiobutton: This widget is used to create a radio button that the user can select. It is typically used in groups, where only one button can be selected at a time.
  7. Listbox: This widget is used to create a list of items that the user can select. It can be used to display a list of options or to allow the user to select multiple items.
  8. Combobox: This widget is used to create a drop-down list of items that the user can select. It can be used to display a list of options or to allow the user to select multiple items.
  9. Message: This widget is used to display a message in a rectangular area. It's similar to a Label but allows for multiple lines of text.
  10. Menu: This widget is used to create a menu bar at the top of a window. It can be used to create pull-down menus and submenus for accessing different options and features.
  11. Scrollbar: This widget is used to create a scrollbar that can be used to scroll the contents of a widget, such as a Listbox or a Text widget.
These are the most common widgets that Tkinter provides, but there are many more widgets available depending on the complexity of the application you are building.

3. Examples Of Uses Of Tkinter

3.1 First Window Tkinter

Example

# import tkinter library
from tkinter import *

# create a window tkinter
root = Tk()

# define the window dimensions
root.geometry("400x300")

# create a label within the window
label = Label(root , text ="This is a label" , font=('arial' , 18))
label.place(x = 100 , y = 100)

# start the event loop
root.mainloop()
 

3.2 Example Of Tkinter Window With Button Action

Here is an example of how to create a simple Tkinter window with a button action and a label:

Example

import tkinter as tk

def on_button_click():
    label.config(text="Hello, World!")

root = tk.Tk()
root.title("Tkinter Example")
root.geometry('250x100')

button = tk.Button(root, text="Click me", command=on_button_click)
button.pack()

label = tk.Label(root, text="Welcome to Tkinter")
label.pack()

root.mainloop()

 


In this example:

  1. we start by importing the tkinter module and giving it a shorter name (tk) for convenience. We then define a function called on_button_click that will be executed when the button is clicked. This function simply changes the text of the label to "Hello, World!".
  2. Next, we create the root window for our application using the Tk() constructor. We set the title of the window to "Tkinter Example".
  3. We then create a button widget, passing the root window as the parent, and setting the text to "Click me" and the command to the on_button_click function we defined earlier. We then use the pack() method to add the button to the window.
  4. We then create a label widget, passing the root window as the parent and setting the text to "Welcome to Tkinter". We then use the pack() method to add the label to the window.
  5. Finally, we call the mainloop() method on the root window to start the event loop and display the window on the screen. The window will stay open until the user closes it or the program exits.
When you run this code, you should see a window with a button and a label. When you click the button, the label's text will change to "Hello, World!". This is a basic example of how to create a Tkinter window and use widgets to create a simple GUI.

Younes Derfoufi
my-courses.net

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